Pre-heat the oven to 200°C.
Scrub the potatoes clean. Place the potatoes in a baking dish coated with olive oil
Bake the potatoes in the oven for 40 minutes, then keep the oven on.
Remove the potatoes from the oven and let them cool. Meanwhile, cut the mozzarella and tomato into pieces. Cut the potato in half and stuff it with mozzarella and tomato.
Place the baking dish back into the oven for another 7 minutes.